CN115333692B

CN115333692B - DMRS port information determining method, device and storage medium

Info

Publication number: CN115333692B
Application number: CN202110507703.3A
Authority: CN
Inventors: 苏昕; 卢艺文; 黄秋萍; 高秋彬
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2024-04-02
Anticipated expiration: 2041-05-10
Also published as: CN115333692A

Abstract

The embodiment of the application provides a method, a device and a storage medium for determining DMRS port information, wherein the method comprises the following steps: determining first configuration information; the first configuration information is used for indicating a type of a DMRS port information indicating table or a DMRS code division multiplexing CDM group; and determining DMRS port information based on the first configuration information. According to the method, the device and the storage medium for determining the DMRS port information, the DMRS port information is determined based on the configuration information for indicating the type of the DMRS port information indication table or the DMRS CDM group, so that the cost of DCI indication is reduced.

Description

DMRS port information determining method, device and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method and an apparatus for determining DMRS port information, and a storage medium.

Background

According to the current protocol, the network side indicates the demodulation reference signal (Demodulation Reference Signal, DMRS) type of the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) and the DMRS maximum symbol number through radio resource control (Radio Resource Control, RRC) signaling. Then, the network side indicates the DMRS port information through the information bit fields of 4,5,6 bits in the downlink control information (Downlink Control Information, DCI) format (format) 1_1 and DCI format 1_2.

For The transmission scheme of The newly added multiple transmission and reception point (Multi Transmitting Receiving Point, MTRP) system frame number (System Frame Number, SFN) in The third generation partnership project (The 3rd Generation Partnership Project,3GPP) standard R17 version, the DMRS port restriction under The scheme is to be increased, and The DMRS port in The PDSCH under The transmission scheme is limited to one code division multiplexing (Code Division Multiplexing, CDM) group.

All DMRS port indications of the transmission scheme only use a part of information in the current DCI indication table, which would cause serious waste of the overhead of the DCI information domain.

Disclosure of Invention

The embodiment of the application provides a method, a device and a storage medium for determining DMRS port information, which are used for solving the technical problem that the cost of a DCI information domain is seriously wasted in the prior art.

In a first aspect, an embodiment of the present application provides a method for determining DMRS port information of a demodulation reference signal, including:

determining first configuration information; the first configuration information is used for indicating a type of a DMRS port information indicating table or a DMRS code division multiplexing CDM group;

and determining DMRS port information based on the first configuration information.

Optionally, in the case that the first configuration information indicates a first type DMRS port information indication table, the determining DMRS port information based on the first configuration information includes:

Screening a first DMRS port information indicating table from the first type of DMRS port information indicating table according to the DMRS type and the DMRS maximum symbol number of the physical downlink shared channel PDSCH;

determining DMRS port information according to the DMRS port information index value and the first DMRS port information indicator table;

the first type DMRS port information indication table includes one or more DMRS port information indication tables; and the DMRS ports indicated in any one of the first-class DMRS port information indication tables are all in the same DMRS CDM group.

Optionally, the determining DMRS port information based on the first configuration information further includes:

and determining the cost of target DCI according to the DMRS type and the maximum number of symbols of the DMRS of the PDSCH, wherein the target DCI is used for bearing the information index value of the DMRS port.

Optionally, in the case that the first configuration information indicates a first DMRS CDM group, the determining DMRS port information based on the first configuration information includes:

screening a second DMRS port information indicating table from the second class of DMRS port information indicating tables according to the DMRS type and the maximum number of the DMRS of the PDSCH;

determining a third DMRS port information indicator according to the first DMRS CDM group and the second DMRS port information indicator;

Determining DMRS port information according to the DMRS port information index value and the third DMRS port information indicator table;

wherein the DMRS ports indicated in any one of the second-class DMRS port information indication tables are within a plurality of DMRS CDM groups, and the entries in the third DMRS port information indication table are a subset of the entries in the second DMRS port information indication table; the DMRS ports indicated in the third DMRS port information indication table are all within the first DMRS CDM group.

Optionally, before determining DMRS port information based on the first configuration information, the method further includes:

receiving a Radio Resource Control (RRC) message;

and analyzing the DMRS type and the DMRS maximum symbol number of the PDSCH from the RRC message.

receiving downlink control information DCI;

and analyzing the DMRS port information index value from the DCI.

Optionally, after determining the DMRS port information based on the first configuration information, the method further includes:

and demodulating PDSCH data according to the DMRS port information.

Optionally, the DMRS port information includes a DMRS port number and a CDM group number without data transmission.

In a second aspect, an embodiment of the present application provides a method for determining DMRS port information of a demodulation reference signal, including:

indicating first configuration information to a terminal; the first configuration information is used for indicating a DMRS port information indicator type or a DMRS code division multiplexing CDM group.

Optionally, the method further comprises:

transmitting a Radio Resource Control (RRC) message to the terminal; the RRC message carries the DMRS type and the maximum symbol number of the PDSCH.

Optionally, the method further comprises:

transmitting downlink control information DCI to a terminal; and the DCI carries the DMRS port information index value.

In a third aspect, embodiments of the present application provide a terminal, including a memory, a transceiver, and a processor;

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

receiving a Radio Resource Control (RRC) message;

receiving downlink control information DCI;

and analyzing the DMRS port information index value from the DCI.

and demodulating PDSCH data according to the DMRS port information.

In a fourth aspect, an embodiment of the present application provides a network side device, including a memory, a transceiver, and a processor;

Optionally, the method further comprises:

In a fifth aspect, an embodiment of the present application provides a demodulation reference signal DMRS port information determining apparatus, including:

the first determining module is used for determining first configuration information; the first configuration information is used for indicating a type of a DMRS port information indicating table or a DMRS code division multiplexing CDM group;

and the second determining module is used for determining the DMRS port information based on the first configuration information.

In a sixth aspect, an embodiment of the present application provides a demodulation reference signal DMRS port information determining apparatus, including:

The first indication module is used for indicating the first configuration information to the terminal; the first configuration information is used for indicating a DMRS port information indicator type or a DMRS code division multiplexing CDM group.

In a seventh aspect, embodiments of the present application further provide a processor readable storage medium storing a computer program, where the computer program is configured to cause the processor to perform the steps of the HARQ codebook transmission method according to the first aspect or the HARQ codebook reception method according to the second aspect.

According to the method, the device and the storage medium for determining the DMRS port information, the DMRS port information is determined based on the configuration information for indicating the type of the DMRS port information indication table or the DMRS CDM group, so that the cost of DCI indication is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is one of flow diagrams of a DMRS port information determining method provided in an embodiment of the present application;

fig. 2 is a second flowchart of a DMRS port information determining method according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a network side device according to an embodiment of the present application;

fig. 5 is one of schematic structural diagrams of a DMRS port information determining apparatus provided in an embodiment of the present application;

fig. 6 is a second schematic structural diagram of a DMRS port information determining apparatus according to an embodiment of the present application.

Detailed Description

In R17, the network side device configures a new SFN transmission scheme of MTRP for the terminal through high-layer signaling, where a data layer of a PDSCH/physical downlink control channel (Physical Downlink Control Channel, PDCCH) and a channel of a DMRS port of the PDSCH/PDCCH have a QCL relationship with one or more quassi Co-Location (QCL) reference signals related to at least one channel large scale parameter. Accordingly, the data layer of each PDSCH/PDCCH and the DMRS ports of the PDSCH/PDCCH come from the transmission of multiple transmission points (TRP/panel). Meanwhile, rel-17 intends to increase DMRS port restriction under the scheme, and limits DMRS ports in PDSCH under the transmission scheme to one CDM group.

According to the current protocol, the network side device first indicates the DMRS type of PDSCH and the maximum number of DMRS symbols through RRC signaling. And the network side equipment indicates the DMRS port information through the information bit fields of 4,5 and 6bits in the DCI formats 1_1 and 1_2, wherein the DMRS port information comprises the DMRS port number, the CDM group number which does not contain PDSCH data, the preamble symbol number and the like. Specific DMRS port information may be determined from tables 1/2/3/4 and tables 1A/2A/3A/4A. Table 1/2/3/4 and Table 1A/2A/3A/4A refer to existing standard protocols and are not described in detail herein.

In R16, when at least one transmission configuration indication (Transmission Configuration Indication, TCI) code point (code point) in the MAC-CE activation information contains two TCI states, adopting the table 1A/2A/3A/4A; otherwise, table 1/2/3/4 is used.

Aiming at the MTRP SFN transmission scheme newly added in R17, the DMRS port limitation under the scheme is to be increased, and the DMRS ports in PDSCH under the transmission scheme are limited in one CDM group, and all the DMRS ports indicate that only a part of information in the current DCI indication table is used. This would result in a significant waste of the overhead of the DCI information field.

Based on the technical problems described above, the embodiments of the present application provide a method for determining DMRS port information of PDSCH according to DCI, where the method can greatly reduce the overhead indicated by DCI while determining DMRS port information in an MTRP SFN transmission scheme.

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Fig. 1 is one of flow diagrams of a DMRS port information determining method provided in the embodiment of the present application, and as shown in fig. 1, an application embodiment provides a DMRS port information determining method, where an execution body may be a terminal, for example, a mobile phone. The method comprises the following steps:

step 101, determining first configuration information; the first configuration information is used for indicating a DMRS port information indicator type or a DMRS code division multiplexing CDM group.

Specifically, in the embodiment of the present application, the terminal first determines first configuration information, where the first configuration information may be carried through higher layer signaling, for example, an RRC message or the like.

The types of the DMRS port information indicating table comprise two types, and the first type of the DMRS port information indicating table is a newly added table in the embodiment of the application. The second type of DMRS port information indication table is a table defined in the existing standard protocol.

The first type DMRS port information indicator table includes one or more DMRS port information indicator tables. The DMRS ports indicated in any DMRS port information indication table in the first type DMRS port information indication table are all within the same DMRS CDM group.

For example, DMRS ports indicated in a certain DMRS port information indication table are all within CDM group 0 (CDM 0 group), or are all within CDM group 1 (CDM 1 group), or are all within CDM group 2 (CDM 2 group).

The second type of DMRS port information indication table is a table defined in the existing standard protocol, including table 1/2/3/4 and table 1A/2A/3A/4A.

The DMRS ports indicated in any one of the DMRS port information indication tables in the second type of DMRS port information indication table are within a plurality of DMRS CDM groups.

Table 1/2/3/4 and Table 1A/2A/3A/4A refer to existing standard protocols and are not described in detail herein.

Step 102, determining DMRS port information based on the first configuration information.

Specifically, in the embodiment of the present application, after determining the first configuration information, the terminal determines DMRS port information based on the first configuration information.

For example, in the case that the first configuration information indicates the first type DMRS port information indicator, the terminal may first screen the first DMRS port information indicator from the first type DMRS port information indicator according to the DMRS type and the maximum number of DMRS of the PDSCH.

Different DMRS types and DMRS maximum symbol numbers correspond to different DMRS port information indication tables, and the first DMRS port information indication table can be determined according to the DMRS types and the DMRS maximum symbol numbers of the PDSCH.

And then, the terminal determines the DMRS port information according to the DMRS port information index value and the first DMRS port information indication table.

For another example, in the case where the first configuration information indicates the first DMRS CDM group, the terminal first screens the second DMRS port information indication table from the second type DMRS port information indication table according to the DMRS type and the DMRS maximum symbol number of the PDSCH.

And then, determining a third DMRS port information indicating table according to the first DMRS CDM group and the second DMRS port information indicating table.

And finally, determining the DMRS port information according to the DMRS port information index value and the third DMRS port information indication table.

The DMRS port information indication table stores a one-to-one correspondence between DMRS port information index values and DMRS port information. And determining the DMRS port information according to the DMRS port information index value and the first DMRS port information indicator table.

In this embodiment, the DMRS port information includes at least one of a DMRS port number, a CDM group number not including PDSCH data, and a preamble symbol number.

According to the DMRS port information determining method, the DMRS port information is determined based on the configuration information for indicating the type of the DMRS port information indication table or the DMRS CDM group, so that the DCI indication overhead is reduced.

Specifically, the types of the DMRS port information indication table include two types, and the first type of DMRS port information indication table is a newly added table in the embodiment of the present application. The second type of DMRS port information indication table is a table defined in the existing standard protocol.

For example, DMRS ports indicated in a certain DMRS port information indication table are all within CDM0 group, or all within CDM1 group, or all within CDM2 group.

In this embodiment of the present application, the first configuration information indicates a first type DMRS port information indicator, and in this case, the terminal first screens the first DMRS port information indicator from the first type DMRS port information indicator according to the DMRS type and the maximum number of DMRS symbols of the PDSCH.

The first type DMRS port information indicator table includes one or more DMRS port information indicator tables. Any DMRS port indicated in any one of the DMRS port information indication tables of the first type of DMRS port information indication table is within the same DMRS CDM group, and therefore,

according to the DMRS port information determining method, the terminal is instructed to use the newly added DMRS port information indication table through the first configuration information, so that the terminal determines the DMRS port information, and the cost of DCI indication is reduced.

Optionally, determining the overhead of a target DCI according to the DMRS type and the maximum number of DMRS symbols of the PDSCH, where the target DCI is used to carry the DMRS port information index value.

Specifically, in the embodiment of the present application, determining DMRS port information based on the first configuration information further includes:

and determining the cost of target DCI according to the DMRS type of the PDSCH and the maximum number of symbols of the DMRS, wherein the target DCI is used for bearing the information index value of the DMRS port.

Specifically, in the embodiment of the present application, when the first configuration information indicates the first DMRS CDM group, the terminal first screens the second DMRS port information indication table from the second type DMRS port information indication table according to the DMRS type and the DMRS maximum symbol number of the PDSCH.

The entries in the third DMRS port information indication table are a subset of the entries in the second DMRS port information indication table. The DMRS ports indicated in the third DMRS port information indication table are all within the first DMRS CDM group.

According to the DMRS port information determining method, the DMRS CDM group is indicated through the first configuration information, so that the terminal determines the DMRS port information, and the cost of DCI indication is reduced.

receiving a Radio Resource Control (RRC) message;

Specifically, in the embodiment of the present application, before the terminal determines the DMRS port information based on the first configuration information, the network side device needs to send an RRC message to the terminal. The DMRS type and the maximum number of symbols of DMRS for the PDSCH are carried in the RRC message.

And the terminal receives the RRC message sent by the network side.

The terminal parses the DMRS type and the maximum number of symbols of the DMRS of the PDSCH from the RRC message.

According to the DMRS port information determining method, the DMRS type and the DMRS maximum symbol number of the PDSCH are borne through the RRC message, so that the compatibility of the system is improved, and the signaling overhead is reduced.

receiving downlink control information DCI;

and analyzing the DMRS port information index value from the DCI.

Specifically, in the embodiment of the present application, before the terminal determines the DMRS port information based on the first configuration information, the network side device needs to send DCI to the terminal. The DCI carries DMRS port information index values.

And the terminal receives the DCI sent by the network side.

And the terminal analyzes the index value of the DMRS port information from the DCI.

According to the DMRS port information determining method, the DCI is used for bearing the DMRS port information index value, so that the compatibility of the system is improved, and the signaling overhead is reduced.

and demodulating PDSCH data according to the DMRS port information.

Specifically, in the embodiment of the present application, after determining the DMRS port information, the terminal performs channel estimation according to the DMRS port information and completes PDSCH data demodulation.

Specifically, in the embodiment of the present application, the DMRS port information includes at least one of a DMRS port number, a CDM group number not including PDSCH data, and a preamble symbol number.

The method in the above embodiment is further described below with several specific examples.

Example one:

and the terminal side receives the DMRS configuration information through the RRC signaling, wherein the DMRS configuration information comprises the type of the DMRS and the maximum symbol number of the DMRS. And defining a newly added DMRS port information indication table, wherein each DMRS port indicated in the newly added DMRS port information indication table is in CDM group 0.

1. By defining newly added DMRS indication tables, wherein the DMRS ports indicated in each table are all within CDM group 0, as shown in tables 1B-4B:

table 1b dmrs type=1, dmrs maximum symbol length=1

Table 2b dmrs type=1, dmrs maximum symbol length=2

Table 3b dmrs type=2, dmrs maximum symbol length=1

Table 4b dmrs type=2, dmrs maximum symbol length=2

2. And the terminal side selects a corresponding DMRS indication table according to different DMRS types and the maximum symbol length, and determines the DMRS port indication overhead (the bit number occupied by the DMRS port information index value in the DCI) in the DCI.

If the DMRS type is 1 and the maximum symbol number is 1, the DMRS indication table is table 1b, and the DMRS indication overhead is 3bits.

If the DMRS type is 1 and the maximum symbol number is 2, the DMRS indication table is table 2b, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, the DMRS indication table is table 3b, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 2, the DMRS indication table is table 4b, and the DMRS indication overhead is 5bits.

3. The terminal determines the specific DMRS port number in the table and the CDM group number without data transmission through DCI.

If the DMRS type is 1 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 011, the terminal in combination with table 1B may determine that the DMRS port number of the PDSCH is 0 and the CDM group number of the current no-data transmission is 2.

4. And the terminal side carries out channel estimation through the determined DMRS port information and completes PDSCH data demodulation.

Example two:

the terminal side receives the DMRS configuration information through RRC signaling, wherein the DMRS configuration information comprises a DMRS type and a DMRS maximum symbol number. And defining newly added DMRS indication tables, wherein DMRS ports indicated in each table are within CDM group 1.

1. By defining newly added DMRS indication tables, wherein the DMRS ports indicated in each table are all within CDM group 1, as shown in tables 1C-4C:

Table 1c dmrs type=1, dmrs maximum symbol length=1

Table 2c dmrs type=1, dmrs maximum symbol length=2

Table 3c dmrs type=2, dmrs maximum symbol length=1

Table 4c dmrs type=2, dmrs maximum symbol length=2

2. And the terminal side selects a corresponding DMRS indication table according to different DMRS types and the maximum symbol length, and determines the DMRS port indication overhead in the DCI.

If the DMRS type is 1 and the maximum symbol number is 1, the DMRS indication table is table 1c, and the DMRS indication overhead is 3bits.

If the DMRS type is 1 and the maximum symbol number is 2, the DMRS indication table is table 2c, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, the DMRS indication table is table 3c, and the DMRS indication overhead is 3bits.

If the DMRS type is 2 and the maximum symbol number is 2, the DMRS indication table is table 4c, and the DMRS indication overhead is 4bits.

If the DMRS type is 1 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal in combination with table 1C may determine that the DMRS port number of the PDSCH is 2/3 and the CDM group number of the current no-data transmission is 2.

Example three:

the terminal side receives the DMRS configuration information through RRC signaling, wherein the DMRS configuration information comprises a DMRS type and a DMRS maximum symbol number. And defining a newly added DMRS indication table, wherein the DMRS ports indicated in the table of DMRS type 1 are all within CDM group 0, and the DMRS ports indicated in the table of DMRS type 2 are all within CDM group 2.

1. By defining the newly added DMRS indication table, it is specifically shown in tables 1D to 4D:

table 1d dmrs type=1, dmrs maximum symbol length=1

Table 2d dmrs type=1, dmrs maximum symbol length=2

/>

Table 3d dmrs type=2, dmrs maximum symbol length=1

Table 4d dmrs type=2, dmrs maximum symbol length=2

/>

If the DMRS type is 1 and the maximum symbol number is 1, the DMRS indication table is table 1d, and the DMRS indication overhead is 3bits.

If the DMRS type is 1 and the maximum symbol number is 2, the DMRS indication table is table 2d, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, the DMRS indication table is table 3d, and the DMRS indication overhead is 3bits.

If the DMRS type is 2 and the maximum symbol number is 2, the DMRS indication table is table 4d, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal may determine that the DMRS port number of the PDSCH is 4/5 in combination with table 3D, and the CDM group number of the current no-data transmission is 3.

Example four:

the terminal side receives the DMRS configuration information through RRC signaling, wherein the DMRS configuration information comprises a DMRS type and a DMRS maximum symbol number. And defining a newly added DMRS indication table, wherein the DMRS ports indicated in the table of DMRS type 1 are all in CDM group 1, and the DMRS ports indicated in the table of DMRS type 1 are all in CDM group 2.

1. By defining newly added DMRS indication tables, wherein the DMRS ports indicated in each table are all within CDM group 0, as shown in tables 1E-4E:

table 1e dmrs type=1, dmrs maximum symbol length=1

Table 2e dmrs type=1, dmrs maximum symbol length=2

Table 3e dmrs type=2, dmrs maximum symbol length=1

Table 4e dmrs type=2, dmrs maximum symbol length=2

If the DMRS type is 1 and the maximum symbol number is 1, the DMRS indication table is table 1e, and the DMRS indication overhead is 3bits.

If the DMRS type is 1 and the maximum symbol number is 2, the DMRS indication table is table 2e, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, the DMRS indication table is table 3e, and the DMRS indication overhead is 3bits.

If the DMRS type is 2 and the maximum symbol number is 2, the DMRS indication table is table 4e, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal may determine that the DMRS port number of the PDSCH is 4/5 in combination with table 3E, and the CDM group number of the current no-data transmission is 3.

Example five:

the DMRS configuration information received by the terminal side through RRC signaling includes DMRS type 1, DMRS maximum symbol number 1 or 2, and CDM group index value 0. And the terminal side determines a new DMRS indication table according to the CDM group index value.

1. First, the terminal side may determine that all ports of the DMRS are from CDM group 0 according to CDM group index value 0.

And then the terminal automatically determines a new DMRS port indication table according to the table 1/2 and CDM index value in the current protocol. Optionally, the new DMRS port indication table is a subset of the DMRS port indication table agreed in advance.

That is, all the information bits contained in DMRS ports 0/1/4/5 can be selected in table 1/2, then the new table 1a/2a is as follows:

table 1a dmrs type=1, dmrs maximum symbol length=1

Table 2a dmrs type=1, dmrs maximum symbol length=2

2. And the terminal side selects a new DMRS indication table according to different maximum symbol numbers and determines the DMRS port indication overhead in the DCI.

If the DMRS type is 1 and the maximum symbol number is 1, the DMRS indication table is table 1a, and the DMRS indication overhead is 3bits.

If the DMRS type is 1 and the maximum symbol number is 2, the DMRS indication table is table 2a, and the DMRS indication overhead is 4bits.

If the DMRS type is 1 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal in combination with table 1a may determine that the DMRS port number of the PDSCH is 0 and 1, and the CDM group number of the current no-data transmission is 1.

4) And the terminal side carries out channel estimation through the determined DMRS port information and completes PDSCH data demodulation.

Example six:

the DMRS configuration information received by the terminal side through RRC signaling includes DMRS type 1, DMRS maximum symbol number, and CDM group index value 1. And the terminal side determines a new DMRS indication table according to the CDM group index value.

1. First, the terminal side may determine that all ports of the DMRS are from CDM group 1 according to CDM group index value 1.

That is, all the information bits contained in the DMRS ports 2/3/6/7 can be selected in the table 1/2, the new table 1b/2b is as follows:

table 1b dmrs type=1, dmrs maximum symbol length=1

Table 2b dmrs type=1, dmrs maximum symbol length=2

/>

If the DMRS type is 1 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal in combination with table 1b may determine that the DMRS port number of the PDSCH is 2/3 and the CDM group number of the current no-data transmission is 2.

Example seven:

the DMRS configuration information received by the terminal side through RRC signaling includes DMRS type 2, the maximum symbol number of the DMRS, and CDM group index value 0. And the terminal side determines a new DMRS indication table according to the CDM group index value.

And then the terminal automatically determines a new DMRS port indication table according to the table 3/4 and CDM index value in the current protocol. Optionally, the new DMRS port indication table is a subset of the DMRS port indication table agreed in advance.

That is, all the information bits contained in DMRS ports 0/1/6/7 can be selected in table 3/4, then the new table 3a/4a is as follows:

table 3a dmrs type=2, dmrs maximum symbol length=1

Table 4a dmrs type=2, dmrs maximum symbol length=2

2. And the terminal side selects a corresponding new DMRS indication table according to different maximum symbol numbers and determines the DMRS port indication overhead in the DCI.

If the DMRS type is 2 and the maximum symbol number is 1, the DMRS indication table is table 3a, and the DMRS indication overhead is 3bits.

If the DMRS type is 2 and the maximum symbol number is 2, the DMRS indication table is table 4a, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal in combination with table 3a may determine that the DMRS port number of the PDSCH is 0/1 and the CDM group number of the current no-data transmission is 1.

Example eight:

the DMRS configuration information received by the terminal side through RRC signaling includes DMRS type 2, maximum symbol number of DMRS, and CDM group index value 1. And the terminal side determines a new DMRS indication table according to the CDM group index value.

That is, all the information bits contained in the DMRS ports 2/3/8/9 can be selected in the table 3/4, the new table 3b/4b is as follows:

table 3b dmrs type=2, dmrs maximum symbol length=1

Table 4b dmrs type=2, dmrs maximum symbol length=2

2. And the terminal side selects a corresponding new DMRS indication table according to different DMRS types and the maximum symbol length, and determines the DMRS port indication overhead in the DCI.

If the DMRS type is 2 and the maximum symbol number is 1, the DMRS indication table is table 3b, and the DMRS indication overhead is 3bits.

If the DMRS type is 2 and the maximum symbol number is 2, the DMRS indication table is table 4b, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal in combination with table 3b may determine that the DMRS port number of the PDSCH is 2/3 and the CDM group number of the current no-data transmission is 2.

Example nine:

the DMRS configuration information received by the terminal side through RRC signaling includes DMRS type 2, DMRS maximum symbol number, and CDM group index value 2. And the terminal side determines a new DMRS indication table according to the CDM group index value.

1. First, the terminal side may determine that all ports of the DMRS are from CDM group 2 according to CDM group index value 2.

And then the terminal automatically determines a new DMRS port indication table according to the table 3/4 and CDM index value 2 in the current protocol. Optionally, the new DMRS port indication table is a subset of the DMRS port indication table agreed in advance.

That is, all the information bits contained in the DMRS ports 4/5/10/11 can be selected in the table 3/4, the new table 3c/4c is as follows:

table 3c dmrs type=2, dmrs maximum symbol length=1

Table 4c dmrs type=2, dmrs maximum symbol length=2

2. And the terminal side selects a corresponding new DMRS indication table according to different maximum symbol lengths and determines the DMRS port indication overhead in the DCI.

If the DMRS type is 2 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal in combination with table 3c may determine that the DMRS port number of the PDSCH is 4/5 and the CDM group number of the current no-data transmission is 3.

The embodiment of the application provides a method for determining DMRS port information of a PDSCH according to DCI, which can greatly reduce DCI indication overhead while determining the DMRS port information in an MTRP SFN transmission scheme.

Fig. 2 is a second flowchart of a DMRS port information determining method provided in the embodiment of the present application, as shown in fig. 2, where an execution body of the DMRS port information determining method may be a network side device, for example, a base station, etc. The method comprises the following steps:

step 201, indicating first configuration information to a terminal; the first configuration information is used for indicating a DMRS port information indicator type or a DMRS code division multiplexing CDM group.

Optionally, the method further comprises:

Specifically, the DMRS port information determining method provided in the embodiment of the present application may refer to the DMRS port information determining method embodiment in which the execution body is a terminal, and may achieve the same technical effects, and the same parts and beneficial effects as those of the corresponding method embodiment in the embodiment are not described in detail herein.

Fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present application, and as shown in fig. 3, the terminal includes a memory 320, a transceiver 300, and a processor 310:

a memory 320 for storing a computer program; a transceiver 300 for transceiving data under the control of the processor 310; a processor 310 for reading the computer program in the memory 320 and performing the following operations:

Specifically, the transceiver 300 is used to receive and transmit data under the control of the processor 310.

Wherein in fig. 3, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 310 and various circuits of memory represented by memory 320, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 300 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including transmission media including wireless channels, wired channels, optical cables, and the like. The user interface 330 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 310 is responsible for managing the bus architecture and general processing, and the memory 320 may store data used by the processor 310 in performing operations.

Alternatively, the processor 310 may be a CPU (Central processing Unit), ASIC (Application Specific Integrated Circuit ), FPGA (Field-Programmable Gate Array, field programmable Gate array) or CPLD (Complex Programmable Logic Device ), and the processor may also employ a multicore architecture.

The processor is configured to execute any of the methods provided in the embodiments of the present application by invoking a computer program stored in a memory in accordance with the obtained executable instructions. The processor and the memory may also be physically separate.

receiving a Radio Resource Control (RRC) message;

receiving downlink control information DCI;

and analyzing the DMRS port information index value from the DCI.

and demodulating PDSCH data according to the DMRS port information.

It should be noted that, the terminal provided in this embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution body is a terminal, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are omitted.

Fig. 4 is a schematic structural diagram of a network side device according to an embodiment of the present application, as shown in fig. 4, where the network side device includes a memory 420, a transceiver 400, and a processor 410:

A memory 420 for storing a computer program; a transceiver 400 for transceiving data under the control of the processor 410; a processor 410 for reading the computer program in the memory 420 and performing the following operations:

Specifically, the transceiver 400 is configured to receive and transmit data under the control of the processor 410.

Wherein in fig. 4, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 410 and various circuits of memory represented by memory 420, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 400 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. The processor 410 is responsible for managing the bus architecture and general processing, and the memory 420 may store data used by the processor 410 in performing operations.

The processor 410 may be a Central Processing Unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), or it may employ a multi-core architecture.

Optionally, the method further comprises:

Specifically, the HARQ codebook sending apparatus provided in this embodiment of the present application may implement all the method steps implemented by the method embodiment in which the execution body is a terminal, and may achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are omitted herein.

Fig. 5 is one of schematic structural diagrams of a DMRS port information determining apparatus provided in the embodiment of the present application, and as shown in fig. 5, the embodiment of the present application provides a DMRS port information determining apparatus, including a first determining module 501 and a second determining module 502, where:

The first determining module 501 is configured to determine first configuration information; the first configuration information is used for indicating a type of a DMRS port information indicating table or a DMRS code division multiplexing CDM group; the second determining module 502 is configured to determine DMRS port information based on the first configuration information.

receiving a Radio Resource Control (RRC) message;

receiving downlink control information DCI;

and analyzing the DMRS port information index value from the DCI.

and demodulating PDSCH data according to the DMRS port information.

Specifically, the DMRS port information determining apparatus provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is a terminal, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the embodiment are omitted herein.

Fig. 6 is a second schematic structural diagram of a DMRS port information determining apparatus according to an embodiment of the present application, and as shown in fig. 6, the embodiment of the present application provides a DMRS port information determining apparatus, including a first indication module 601.

The first indication module 601 is configured to indicate first configuration information to a terminal; the first configuration information is used for indicating a DMRS port information indicator type or a DMRS code division multiplexing CDM group.

Optionally, the method further comprises:

Specifically, the DMRS port information determining apparatus provided in the embodiment of the present application may implement all the method steps implemented by the method embodiment in which the execution body is a network side device, and may achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the embodiment are omitted herein.

It should be noted that the division of the units/modules in the embodiments of the present application is merely a logic function division, and other division manners may be implemented in practice. In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution, in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Optionally, an embodiment of the present application further provides a processor readable storage medium, where a computer program is stored, where the computer program is configured to cause the processor to perform the method provided in the foregoing embodiments, where the method includes:

Determining the total number of candidate Physical Downlink Shared Channel (PDSCH) receiving opportunities based on HARQ feedback time sets of a plurality of candidate services, and determining a codebook sequence corresponding to the candidate PDSCH receiving opportunities in each time unit; determining the value of each bit in the HARQ codebook according to whether each candidate PDSCH receiving opportunity correctly receives downlink data; and sending the HARQ codebook.

Or comprises:

receiving an HARQ codebook sent by a terminal; the HARQ codebook is transmitted after the terminal determines the total number of candidate PDSCH receiving opportunities based on the HARQ feedback time set of each candidate service in a plurality of candidate services, determines the codebook sequence corresponding to the candidate PDSCH receiving opportunities in each time unit, and determines the value of each bit in the HARQ codebook according to whether each candidate PDSCH receiving opportunity correctly receives downlink data.

It should be noted that: the processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), and the like.

In addition, it should be noted that: in the embodiment of the application, the term "and/or" describes the association relationship of the association objects, which means that three relationships may exist, for example, a and/or B may be represented: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The term "plurality" in the embodiments of the present application means two or more, and other adjectives are similar thereto.

The technical scheme provided by the embodiment of the application can be suitable for various systems, in particular to a 5G system. For example, suitable systems may be global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet Radio service (general packet Radio service, GPRS), long term evolution (long term evolution, LTE), LTE frequency division duplex (frequency division duplex, FDD), LTE time division duplex (time division duplex, TDD), long term evolution-advanced (long term evolution advanced, LTE-a), universal mobile system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX), 5G New air interface (New Radio, NR), and the like. Terminal devices and network devices are included in these various systems. Core network parts such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS) etc. may also be included in the system.

The terminal device according to the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem, etc. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal devices may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless terminal device may also be referred to as a system, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile), remote station (remote station), access point (access point), remote terminal device (remote terminal), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), user equipment (user device), and the embodiments of the present application are not limited.

The network device according to the embodiment of the present application may be a base station, where the base station may include a plurality of cells for providing services for a terminal. A base station may also be called an access point or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or other names, depending on the particular application. The network device may be operable to exchange received air frames with internet protocol (Internet Protocol, IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile communications, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a network device (NodeB) in a wideband code division multiple access (Wide-band Code Division Multiple Access, WCDMA), an evolved network device (evolutional Node B, eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in a 5G network architecture (next generation system), a home evolved base station (Home evolved Node B, heNB), a relay node (relay node), a home base station (femto), a pico base station (pico), and the like. In some network structures, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

Multiple-input Multiple-output (Multi Input Multi Output, MIMO) transmissions may each be made between a network device and a terminal device using one or more antennas, and the MIMO transmissions may be Single User MIMO (SU-MIMO) or Multiple User MIMO (MU-MIMO). The MIMO transmission may be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or may be diversity transmission, precoding transmission, beamforming transmission, or the like, depending on the form and number of the root antenna combinations.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A method for determining DMRS port information of a demodulation reference signal, comprising:

determining first configuration information; the first configuration information is used for indicating a type of a DMRS port information indicating table or a DMRS code division multiplexing CDM group; the type of the DMRS port information indicating table at least comprises a first type of DMRS port information indicating table; any DMRS port indicated in any DMRS port information indication table in the first type DMRS port information indication table is in the same DMRS CDM group;

determining DMRS port information based on the first configuration information; the DMRS CDM group is a CDM group where the DMRS port corresponding to the DMRS port information is located.

2. The DMRS port information determining method according to claim 1, wherein, in a case where the first configuration information indicates a first type of DMRS port information indication table, the determining DMRS port information based on the first configuration information includes:

The first type DMRS port information indication table includes one or more DMRS port information indication tables.

3. The DMRS port information determining method according to claim 2, wherein the determining DMRS port information based on the first configuration information further includes:

4. The DMRS port information determination method of claim 1, wherein, in a case where the first configuration information indicates a first DMRS CDM group, the determining DMRS port information based on the first configuration information includes:

5. The DMRS port information determining method according to claim 1, wherein before determining DMRS port information based on the first configuration information, further includes:

receiving a Radio Resource Control (RRC) message;

6. The DMRS port information determining method according to claim 1, wherein before determining DMRS port information based on the first configuration information, further includes:

receiving downlink control information DCI;

and analyzing the index value of the DMRS port information from the DCI.

7. The DMRS port information determining method according to claim 1, wherein after determining DMRS port information based on the first configuration information, further comprising:

and demodulating PDSCH data according to the DMRS port information.

8. The DMRS port information determination method of claim 1, wherein the DMRS port information includes a DMRS port number and a CDM group number for no data transmission.

9. A method for determining DMRS port information of a demodulation reference signal, comprising:

indicating first configuration information to a terminal; the first configuration information is used for indicating a type of a DMRS port information indicating table or a DMRS code division multiplexing CDM group; the type of the DMRS port information indicating table at least comprises a first type of DMRS port information indicating table; any DMRS port indicated in any DMRS port information indication table in the first type DMRS port information indication table is in the same DMRS CDM group; the DMRS CDM group is a CDM group where the DMRS port corresponding to the DMRS port information is located.

10. The DMRS port information determination method of claim 9, further comprising:

11. The DMRS port information determination method of claim 9, further comprising:

transmitting downlink control information DCI to a terminal; the DCI carries the index value of the DMRS port information.

12. A terminal comprising a memory, a transceiver, and a processor;

13. The terminal of claim 12, wherein in the case where the first configuration information indicates a first type of DMRS port information indication table, the determining DMRS port information based on the first configuration information comprises:

14. The terminal of claim 13, wherein the determining DMRS port information based on the first configuration information further comprises:

15. The terminal of claim 12, wherein, in the case where the first configuration information indicates a first DMRS CDM group, the determining DMRS port information based on the first configuration information comprises:

16. The terminal of claim 12, wherein prior to determining DMRS port information based on the first configuration information, further comprising:

receiving a Radio Resource Control (RRC) message;

17. The terminal of claim 12, wherein prior to determining DMRS port information based on the first configuration information, further comprising:

Receiving downlink control information DCI;

and analyzing the index value of the DMRS port information from the DCI.

18. The terminal of claim 12, wherein after determining DMRS port information based on the first configuration information, further comprising:

and demodulating PDSCH data according to the DMRS port information.

19. The terminal of claim 12, wherein the DMRS port information includes a DMRS port number and a CDM group number for no data transmission.

20. A network side device, comprising a memory, a transceiver, and a processor;

21. The network-side device of claim 20, further comprising:

22. The network-side device of claim 20, further comprising:

23. A demodulation reference signal DMRS port information determining apparatus, comprising:

the first determining module is used for determining first configuration information; the first configuration information is used for indicating a type of a DMRS port information indicating table or a DMRS code division multiplexing CDM group; the type of the DMRS port information indicating table at least comprises a first type of DMRS port information indicating table; any DMRS port indicated in any DMRS port information indication table in the first type DMRS port information indication table is in the same DMRS CDM group;

a second determining module, configured to determine DMRS port information based on the first configuration information; the DMRS CDM group is a CDM group where the DMRS port corresponding to the DMRS port information is located.

24. A demodulation reference signal DMRS port information determining apparatus, comprising:

The first indication module is used for indicating the first configuration information to the terminal; the first configuration information is used for indicating a type of a DMRS port information indicating table or a DMRS code division multiplexing CDM group; the type of the DMRS port information indicating table at least comprises a first type of DMRS port information indicating table; any DMRS port indicated in any DMRS port information indication table in the first type DMRS port information indication table is in the same DMRS CDM group; the DMRS CDM group is a CDM group where the DMRS port corresponding to the DMRS port information is located.

25. A processor-readable storage medium, wherein the processor-readable storage medium stores a computer program for causing the processor to perform the DMRS port information determination method of any one of claims 1 to 11.